Steps to reproduce the problem:
1. Launch Evolution. 
2. Go to Local Folders->Inbox, select and open the welcome message in this   
   folder (or any other message).
3. Press F7 to switch to caret mode.
4. Move focus into message body.
5. Move the caret to the beginning of the first line.
6. Hit End.

Actual Results:
  The cursor is moved to the end of that line but the message is scrolled
down (until the end of the message). So the line containing the cursor
might be no longer visible.
  The same thing happens if the cursor is at the end of the line and I hit
Home: the cursor is moved to the beginning of that line but the message is
scrolled up (until the beginning of the message). 

Expected Results:
  If the Caret Mode is enabled, Home/End should move the cursor to the
beginning/end of the current line, without scrolling the message to the
beginning/end.

How often does this happen? 
 Always.